pthread_rwlockattr_setpshared(3) freebsd man page | unix.com

PTHREAD_RWLOCKATTR_SETPSHARED(3)			   BSD Library Functions Manual 			  PTHREAD_RWLOCKATTR_SETPSHARED(3)

NAME
     pthread_rwlockattr_setpshared -- set the process shared attribute

LIBRARY
     POSIX Threads Library (libpthread, -lpthread)

SYNOPSIS
     #include <pthread.h>

     int
     pthread_rwlockattr_setpshared(pthread_rwlockattr_t *attr, int pshared);

DESCRIPTION
     The pthread_rwlockattr_setpshared() function sets the process shared attribute of attr to the value referenced by pshared.  The pshared argu-
     ment may be one of two values:

     PTHREAD_PROCESS_SHARED   Any thread of any process that has access to the memory where the read/write lock resides can manipulate the lock.

     PTHREAD_PROCESS_PRIVATE  Only threads created within the same process as the thread that initialized the read/write lock can manipulate the
			      lock.  This is the default value.

RETURN VALUES
     If successful, the pthread_rwlockattr_setpshared() function will return zero.  Otherwise an error number will be returned to indicate the
     error.

ERRORS
     The pthread_rwlockattr_setpshared() function will fail if:

     [EINVAL]		The value specified by attr or pshared is invalid.

SEE ALSO
     pthread_rwlock_init(3), pthread_rwlockattr_getpshared(3), pthread_rwlockattr_init(3)

STANDARDS
     The pthread_rwlockattr_setpshared() function is expected to conform to Version 2 of the Single UNIX Specification (``SUSv2'').

HISTORY
     The pthread_rwlockattr_setpshared() function first appeared in FreeBSD 3.0.

BUGS
     The PTHREAD_PROCESS_SHARED attribute is not supported.

BSD
								  August 4, 1998							       BSD